/*-
 * Copyright (c) 2015 Ruslan Bukin <br@bsdpad.com>
 * All rights reserved.
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
 * ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
/*
 * This file contains the USB template for USB Networking and Serial
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#ifdef USB_GLOBAL_INCLUDE_FILE
#include USB_GLOBAL_INCLUDE_FILE
#else
#include <sys/stdint.h>
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/module.h>
#include <sys/lock.h>
#include <sys/condvar.h>
#include <sys/sysctl.h>
#include <sys/unistd.h>
#include <sys/callout.h>
#include <sys/malloc.h>
#include <sys/caps.h>

#include <bus/u4b/usb.h>
#include <bus/u4b/usbdi.h>
#include <bus/u4b/usb_core.h>
#include <bus/u4b/usb_cdc.h>

#include <bus/u4b/template/usb_template.h>
#endif          /* USB_GLOBAL_INCLUDE_FILE */

#define MODEM_IFACE_0 0
#define MODEM_IFACE_1 1

enum {
        STRING_LANG_INDEX,
        STRING_MODEM_INDEX,
        STRING_ETH_MAC_INDEX,
        STRING_ETH_CONTROL_INDEX,
        STRING_ETH_DATA_INDEX,
        STRING_ETH_CONFIG_INDEX,
        STRING_CONFIG_INDEX,
        STRING_VENDOR_INDEX,
        STRING_PRODUCT_INDEX,
        STRING_SERIAL_INDEX,
        STRING_MAX,
};

#define STRING_MODEM \
  "U\0S\0B\0 \0M\0o\0d\0e\0m\0 \0I\0n\0t\0e\0r\0f\0a\0c\0e"

#define STRING_ETH_MAC \
  "2\0A\0002\0003\0004\0005\0006\0007\08\09\0A\0B"

#define STRING_ETH_CONTROL \
  "U\0S\0B\0 \0E\0t\0h\0e\0r\0n\0e\0t\0 " \
  "\0C\0o\0m\0m\0 \0I\0n\0t\0e\0r\0f\0a\0c\0e"

#define STRING_ETH_DATA \
  "U\0S\0B\0 \0E\0t\0h\0e\0r\0n\0e\0t\0 \0D\0a\0t\0a\0 " \
  "\0I\0n\0t\0e\0r\0f\0a\0c\0e"

#define STRING_CONFIG \
  "D\0e\0f\0a\0u\0l\0t\0 \0c\0o\0n\0f\0i\0g\0u\0r\0a\0t\0i\0o\0n"

#define STRING_VENDOR \
  "T\0h\0e\0 \0F\0r\0e\0e\0B\0S\0D\0 \0P\0r\0o\0j\0e\0c\0t"

#define STRING_PRODUCT \
  "S\0E\0R\0I\0A\0L\0N\0E\0T"

#define STRING_SERIAL \
  "J\0a\0n\0u\0a\0r\0y\0 \0002\0000\0001\0005"

/* make the real string descriptors */

USB_MAKE_STRING_DESC(STRING_MODEM, string_modem);
USB_MAKE_STRING_DESC(STRING_ETH_MAC, string_eth_mac);
USB_MAKE_STRING_DESC(STRING_ETH_CONTROL, string_eth_control);
USB_MAKE_STRING_DESC(STRING_ETH_DATA, string_eth_data);
USB_MAKE_STRING_DESC(STRING_CONFIG, string_serialnet_config);
USB_MAKE_STRING_DESC(STRING_VENDOR, string_serialnet_vendor);
USB_MAKE_STRING_DESC(STRING_PRODUCT, string_serialnet_product);
USB_MAKE_STRING_DESC(STRING_SERIAL, string_serialnet_serial);

/* prototypes */

static usb_temp_get_string_desc_t serialnet_get_string_desc;

static const struct usb_cdc_union_descriptor eth_union_desc = {
        .bLength = sizeof(eth_union_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_UNION,
        .bMasterInterface = 0,          /* this is automatically updated */
        .bSlaveInterface[0] = 1,        /* this is automatically updated */
};

static const struct usb_cdc_header_descriptor eth_header_desc = {
        .bLength = sizeof(eth_header_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_HEADER,
        .bcdCDC[0] = 0x10,
        .bcdCDC[1] = 0x01,
};

static const struct usb_cdc_ethernet_descriptor eth_enf_desc = {
        .bLength = sizeof(eth_enf_desc),
        .bDescriptorType = UDESC_CS_INTERFACE,
        .bDescriptorSubtype = UDESCSUB_CDC_ENF,
        .iMacAddress = STRING_ETH_MAC_INDEX,
        .bmEthernetStatistics = {0, 0, 0, 0},
        .wMaxSegmentSize = {0xEA, 0x05},/* 1514 bytes */
        .wNumberMCFilters = {0, 0},
        .bNumberPowerFilters = 0,
};

static const void *eth_control_if_desc[] = {
        &eth_union_desc,
        &eth_header_desc,
        &eth_enf_desc,
        NULL,
};

static const struct usb_temp_packet_size bulk_mps = {
        .mps[USB_SPEED_FULL] = 64,
        .mps[USB_SPEED_HIGH] = 512,
};

static const struct usb_temp_packet_size intr_mps = {
        .mps[USB_SPEED_FULL] = 8,
        .mps[USB_SPEED_HIGH] = 8,
};

static const struct usb_temp_endpoint_desc bulk_in_ep = {
        .pPacketSize = &bulk_mps,
#ifdef USB_HIP_IN_EP_0
        .bEndpointAddress = USB_HIP_IN_EP_0,
#else
        .bEndpointAddress = UE_DIR_IN,
#endif
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc bulk_out_ep = {
        .pPacketSize = &bulk_mps,
#ifdef USB_HIP_OUT_EP_0
        .bEndpointAddress = USB_HIP_OUT_EP_0,
#else
        .bEndpointAddress = UE_DIR_OUT,
#endif
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc intr_in_ep = {
        .pPacketSize = &intr_mps,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_INTERRUPT,
};

static const struct usb_temp_endpoint_desc *eth_intr_endpoints[] = {
        &intr_in_ep,
        NULL,
};

static const struct usb_temp_interface_desc eth_control_interface = {
        .ppEndpoints = eth_intr_endpoints,
        .ppRawDesc = eth_control_if_desc,
        .bInterfaceClass = UICLASS_CDC,
        .bInterfaceSubClass = UISUBCLASS_ETHERNET_NETWORKING_CONTROL_MODEL,
        .bInterfaceProtocol = 0,
        .iInterface = STRING_ETH_CONTROL_INDEX,
};

static const struct usb_temp_endpoint_desc *eth_data_endpoints[] = {
        &bulk_in_ep,
        &bulk_out_ep,
        NULL,
};

static const struct usb_temp_interface_desc eth_data_null_interface = {
        .ppEndpoints = NULL,            /* no endpoints */
        .bInterfaceClass = UICLASS_CDC_DATA,
        .bInterfaceSubClass = 0,
        .bInterfaceProtocol = 0,
        .iInterface = STRING_ETH_DATA_INDEX,
};

static const struct usb_temp_interface_desc eth_data_interface = {
        .ppEndpoints = eth_data_endpoints,
        .bInterfaceClass = UICLASS_CDC_DATA,
        .bInterfaceSubClass = UISUBCLASS_DATA,
        .bInterfaceProtocol = 0,
        .iInterface = STRING_ETH_DATA_INDEX,
        .isAltInterface = 1,            /* this is an alternate setting */
};

static const struct usb_temp_packet_size modem_bulk_mps = {
        .mps[USB_SPEED_LOW] = 8,
        .mps[USB_SPEED_FULL] = 64,
        .mps[USB_SPEED_HIGH] = 512,
};

static const struct usb_temp_packet_size modem_intr_mps = {
        .mps[USB_SPEED_LOW] = 8,
        .mps[USB_SPEED_FULL] = 8,
        .mps[USB_SPEED_HIGH] = 8,
};

static const struct usb_temp_interval modem_intr_interval = {
        .bInterval[USB_SPEED_LOW] = 8,  /* 8ms */
        .bInterval[USB_SPEED_FULL] = 8, /* 8ms */
        .bInterval[USB_SPEED_HIGH] = 7, /* 8ms */
};

static const struct usb_temp_endpoint_desc modem_ep_0 = {
        .pPacketSize = &modem_intr_mps,
        .pIntervals = &modem_intr_interval,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_INTERRUPT,
};

static const struct usb_temp_endpoint_desc modem_ep_1 = {
        .pPacketSize = &modem_bulk_mps,
        .bEndpointAddress = UE_DIR_OUT,
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc modem_ep_2 = {
        .pPacketSize = &modem_bulk_mps,
        .bEndpointAddress = UE_DIR_IN,
        .bmAttributes = UE_BULK,
};

static const struct usb_temp_endpoint_desc *modem_iface_0_ep[] = {
        &modem_ep_0,
        NULL,
};

static const struct usb_temp_endpoint_desc *modem_iface_1_ep[] = {
        &modem_ep_1,
        &modem_ep_2,
        NULL,
};

static const uint8_t modem_raw_desc_0[] = {
        0x05, 0x24, 0x00, 0x10, 0x01
};

static const uint8_t modem_raw_desc_1[] = {
        0x05, 0x24, 0x06, MODEM_IFACE_0, MODEM_IFACE_1
};

static const uint8_t modem_raw_desc_2[] = {
        0x05, 0x24, 0x01, 0x03, MODEM_IFACE_1
};

static const uint8_t modem_raw_desc_3[] = {
        0x04, 0x24, 0x02, 0x07
};

static const void *modem_iface_0_desc[] = {
        &modem_raw_desc_0,
        &modem_raw_desc_1,
        &modem_raw_desc_2,
        &modem_raw_desc_3,
        NULL,
};

static const struct usb_temp_interface_desc modem_iface_0 = {
        .ppRawDesc = modem_iface_0_desc,
        .ppEndpoints = modem_iface_0_ep,
        .bInterfaceClass = 2,
        .bInterfaceSubClass = 2,
        .bInterfaceProtocol = 1,
        .iInterface = STRING_MODEM_INDEX,
};

static const struct usb_temp_interface_desc modem_iface_1 = {
        .ppEndpoints = modem_iface_1_ep,
        .bInterfaceClass = 10,
        .bInterfaceSubClass = 0,
        .bInterfaceProtocol = 0,
        .iInterface = STRING_MODEM_INDEX,
};

static const struct usb_temp_interface_desc *serialnet_interfaces[] = {
        &modem_iface_0,
        &modem_iface_1,
        &eth_control_interface,
        &eth_data_null_interface,
        &eth_data_interface,
        NULL,
};

static const struct usb_temp_config_desc serialnet_config_desc = {
        .ppIfaceDesc = serialnet_interfaces,
        .bmAttributes = UC_BUS_POWERED,
        .bMaxPower = 25,                /* 50 mA */
        .iConfiguration = STRING_CONFIG_INDEX,
};
static const struct usb_temp_config_desc *serialnet_configs[] = {
        &serialnet_config_desc,
        NULL,
};

const struct usb_temp_device_desc usb_template_serialnet = {
        .getStringDesc = &serialnet_get_string_desc,
        .ppConfigDesc = serialnet_configs,
        .idVendor = USB_TEMPLATE_VENDOR,
        .idProduct = 0x0001,
        .bcdDevice = 0x0100,
        .bDeviceClass = UDCLASS_COMM,
        .bDeviceSubClass = 0,
        .bDeviceProtocol = 0,
        .iManufacturer = STRING_VENDOR_INDEX,
        .iProduct = STRING_PRODUCT_INDEX,
        .iSerialNumber = STRING_SERIAL_INDEX,
};

/*------------------------------------------------------------------------*
 *      serialnet_get_string_desc
 *
 * Return values:
 * NULL: Failure. No such string.
 * Else: Success. Pointer to string descriptor is returned.
 *------------------------------------------------------------------------*/
static const void *
serialnet_get_string_desc(uint16_t lang_id, uint8_t string_index)
{
        static const void *ptr[STRING_MAX] = {
                [STRING_LANG_INDEX] = &usb_string_lang_en,
                [STRING_MODEM_INDEX] = &string_modem,
                [STRING_ETH_MAC_INDEX] = &string_eth_mac,
                [STRING_ETH_CONTROL_INDEX] = &string_eth_control,
                [STRING_ETH_DATA_INDEX] = &string_eth_data,
                [STRING_CONFIG_INDEX] = &string_serialnet_config,
                [STRING_VENDOR_INDEX] = &string_serialnet_vendor,
                [STRING_PRODUCT_INDEX] = &string_serialnet_product,
                [STRING_SERIAL_INDEX] = &string_serialnet_serial,
        };

        if (string_index == 0) {
                return (&usb_string_lang_en);
        }
        if (lang_id != 0x0409) {
                return (NULL);
        }
        if (string_index < STRING_MAX) {
                return (ptr[string_index]);
        }
        return (NULL);
}